fn is_skip_item_attr()

in src/bindgen/utilities.rs [81:133]

• 39 lines of code
• 7 McCabe index (conditional complexity)

fn is_skip_item_attr(attr: &syn::Meta) -> bool {
    match *attr {
        syn::Meta::Path(ref path) => {
            // TODO(emilio): It'd be great if rustc allowed us to use a syntax
            // like `#[cbindgen::ignore]` or such.
            path.is_ident("test")
        }
        syn::Meta::List(ref list) => {
            if !list.path.is_ident("cfg") {
                return false;
            }

            // Remove commas of the question by parsing
            let parser = syn::punctuated::Punctuated::<proc_macro2::TokenStream, syn::Token![,]>::parse_terminated;
            let Ok(tokens) = list.parse_args_with(parser) else {
                // cfg attr is a list separated by comma, if that fails, that is probably a malformed cfg attribute
                return false;
            };

            for token in tokens {
                let Ok(path) = syn::parse2::<syn::Path>(token) else {
                    // we are looking for `test`, that should always happen only as path
                    return false;
                };

                if path.is_ident("test") {
                    return true;
                }
            }
            false
            // list.nested.iter().any(|nested| match *nested {
            //     syn::NestedMeta::Meta(ref meta) => is_skip_item_attr(meta),
            //     syn::NestedMeta::Lit(..) => false,
            // })
        }
        syn::Meta::NameValue(ref name_value) => {
            if name_value.path.is_ident("doc") {
                if let syn::Expr::Lit(syn::ExprLit {
                    lit: syn::Lit::Str(ref content),
                    ..
                }) = name_value.value
                {
                    // FIXME(emilio): Maybe should use the general annotation
                    // mechanism, but it seems overkill for this.
                    if content.value().trim() == "cbindgen:ignore" {
                        return true;
                    }
                }
            }
            false
        }
    }
}